user
Instruction: What is a main difference between a stack and a queue?
Output:
assistant
The main difference between a stack and a queue is the order of operations. A stack follows the Last In First Out (LIFO) structure, while a queue follows the First In First Out (FIFO) structure. This means that items are either added to the bottom of a stack or deleted from the top, while items are always added to the back of the queue and deleted from the front.